<html>
<head>
<style>

#colset {
  width: 300pt;
  height: 2in;
  -moz-column-count: 3;
  -moz-column-gap: 0;
}

.ocontainer {
  height: 0;
}

.overflow {
  height: 5in;
}

</style>

<script>
function boom()
{
  var newDiv = document.createElementNS("http://www.w3.org/1999/xhtml", "div");
  var colset = document.getElementById("colset");
  colset.insertBefore(newDiv, colset.childNodes[1]);
}
</script>

</head>

<body onload="boom();">

<div id="colset"><div class="ocontainer"><div class="overflow"></div></div>    </div>

</body>
</html>
